The Tallboys at The Tractor Tavern

FILE - In this Sept. 27, 2011 file photo, singer Britney Spears performs on a stage during a concert in Kiev, Ukraine, during her European Femme Fatale Tour. A source says she is joining Simon Cowell's singing contest as a judge on the singing competition series "The X-Factor." (AP Photo/Leonid Naidiouk, file)